A mellow braised cabbage perfect to use as a side for smoked sausages or pork chops.
In a medium pot or Dutch oven, cook the onions in the butter over medium heat until softened and nearly caramelized, about 10 minutes. Add the cabbage and cook, stirring, for a few minutes. Add the apple, brown sugar, wine, vinegar, and water or stock, and bring up to a simmer, stirring.
Cover and braise for 20 to 25 minutes, stirring now and then and checking on the texture. Cook a little less for a firmer cabbage; a little more for softer cabbage. You may need to add more liquid, water is fine if your lid is not tight.
Salt and pepper to taste. Add a small splash of cider vinegar just before serving, if desired or a touch more sugar.